Originally Posted by itznfb
What grief would it cause? . . . . It's the most flexible and compatible
For as long as I have been ripping BD, MKV has been the container du jour and yet it seems that just about every player will have some sort of issue with at least some MKV files -- people are posting on it all the time in the player threads. People like to say it's just a container and so should have no impact on the content, but I don't buy that. The spec. for MKV is very broad because it is meant to do so much and be the "everything" container. I don't think any player has 100% MKV support and the tools to make MKV files also have variability in the files they produce. m2ts is more narrow and well defined and is the native container for BD. It does not have all the container possibilities of MKV but it does exactly what it is supposed to do for BD video. I'm guessing that its rigidly narrow scope makes it straight-forward to implement because I have never read postings of a player that has trouble with .m2ts files. When I first started ripping BD I experimented with MKV tools and immediately ran into playback issues with some rips. I went with .m2ts, which were flawless from the start, and never looked back at MKV. In the intervening time I imagine the MKV tools have gotten more refined and debugged but people are still posting problems with some MKV files and their particular player -- you just never seem to see this with .m2ts. And aren't there still issues with having to convert BD subtitles to a different format for MKV. I suspect that a lot of attraction for MKV stems from the free perpetual beta of MakeMKV which is essentially a free BD ripper.
The only functional difference between .m2ts and MKV for BD rips is that MKV contains chapter point information whereas .m2ts does not. Chapter points in MKV aren't worth a whole lot on a player that doesn't support them (again it's that point I made about lack of 100% MKV support in players). On the other hand for players like the Live-SMP, which has skip-to-time functionality, chapter points are irrelevant and so there is no advantage to MKV.
Now, if you were to argue all the benefits MKV has for other codecs and formats, I would have no comment either way. I don't download/upload anything from/to the internet. Like others, I deal only in ripping 1:1 BD Video for home media-player playback and have the tools that allow me to rip as native m2ts. Unless you absolutely must have chapter points embedded, I see no reason to switch from native BD.m2ts and convert the container to MKV.